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Coronary artery disease: an inflammatory or infectious process
Insights
Coronary artery disease involves inflammation. The review suggests Chlamydia pneumoniae may be a key infectious agent accelerating atherosclerosis, supported by seroepidemiologic and PCR studies.
Area of Science:
- Cardiovascular Medicine
- Infectious Diseases
- Pathology
Background:
- Coronary artery disease (CAD) is strongly associated with inflammation.
- The specific agents that trigger or worsen CAD remain unclear.
- Potential causes include glycosylated proteins in diabetes, oxidized LDL in hypercholesterolemia, and infectious agents.
Purpose of the Study:
- To review the current understanding of inflammation's role in CAD development and progression.
- To evaluate the evidence implicating infectious agents, particularly Chlamydia pneumoniae, in atherosclerosis.
Main Methods:
- Literature review of seroepidemiologic studies.
- Analysis of polymerase chain reaction (PCR) detection of chlamydial DNA in atherosclerotic plaques.
- Consideration of microbial isolation from atherosclerotic tissue.
Main Results:
- Chlamydia pneumoniae is identified as the most probable infectious agent linked to atherosclerosis.
- Seroepidemiologic data supports a connection between Chlamydia pneumoniae and CAD.
- Chlamydial DNA has been detected in atherosclerotic plaques.
- Chlamydia pneumoniae is the only microorganism successfully isolated from atherosclerotic tissue.
Conclusions:
- Inflammation is a critical component in the pathogenesis of coronary artery disease.
- Chlamydia pneumoniae is a significant candidate pathogen implicated in the development and progression of atherosclerosis.
- Further research is warranted to fully elucidate the role of Chlamydia pneumoniae in CAD.
Abstract:
It is well accepted that coronary artery disease is linked to an inflammatory process. It is unknown which agents may cause or accelerate coronary artery disease. An inflammation of the vessel wall may be caused by a number of mechanisms such as accumulation of glycosylated proteins in diabetic patients, oxidised LDL in patients with hypercholesterolemia or infectious agents. Among the possible infectious agents Chlamydia pneumoniae is the most likely microorganism involved in atherosclerosis. The arguments in favour of Chlamydia pneumoniae result from seroepidemiologic studies and from detection of chlamydial DNA in atherosclerotic plaques by polymerase chain reaction (PCR). In addition this microorganism is the only one that could be isolated from atherosclerotic tissue. This review summarises the present understanding of the role of an inflammatory process in the development or progression of coronary artery disease.